The Intelligent Control System Research Of Mine Hoist Mechanical Manufacture And Automation

Mine hoister is one of the main equipment in mine. It conveys not only mineral but also miners. So the performance of mine hoister is concerned with hundreds of miners'lives. At present, the mine hoisting equipment in China are mainly rest on the TDK electric control which is used in 1960s and 1970s. Although interrelated renovations have been done in recent years, essentially it is still the contact control system which is made up of the contactor-relay, tachogenerator, etc. The hardware wring system of the contact control system is complex and has high hazard rate.During the renovation of this mine hoister system, the PLC is applied to the control system, and plentiful soft components of the PLC are applied to replace the contactor and relay of the original electric control system to remould the PLC control system. Combining with the features of PLC, the dual redundant of the safety circuit is achieved. S velocity curve is used to improve the present five-stage velocity diagram, avoiding oversized change of acceleration and realizing the smooth transition of original velocity diagram. The fuzzy control arithmetic is introduced to the mine hoister system, employing fuzzy-PID control strategy to achieve coordination control between braking system and velocity control system, to make the control system works safely and placidly.Live-debugging and operating indicate that this system operates steadily and reliably, the control accuracy is high, the operation is simple and it can totally satisfy the needs of actual mineral production.